Invalid OVER clause parses successfully

[clement911]

Example:

        var parser = new TSql170Parser(true, SqlEngineType.SqlAzure);
        var scalarExpr = parser.ParseExpression(new StringReader("COUNT(*) OVER([col])"), out var errors);
        Assert.IsTrue(errors.Count == 0 && scalarExpr != null);

        var gen = new Sql170ScriptGenerator(new SqlScriptGeneratorOptions
        {
            SqlEngineType = SqlEngineType.SqlAzure,
            SqlVersion = SqlVersion.Sql170
        });
        gen.GenerateScript(scalarExpr, out string formattedSql);
        Assert.IsTrue(formattedSql == "COUNT(*) OVER [col]");

Notice that the OVER clause is invalid as it should be contain a PARTITION or ORDER BY clause, not just a column.
In addition, when the script is formatted with the scriptgenerator, the parens are removed altoghter, which creates an unparsable result.

UPDATE: this was verified with version 170.191.0, which is the latest stable release as of today